Kevin M. Beaver, Joseph A. Schwartz, Eric J. Connolly, Joseph L. Nedelec, Mohammed Said Al-Ghamdi, Ahmed Nezar Kobeisy Intelligence http://www.sciencedirect.com/science/article/pii/S0160289613000858 2013 Date Sat, 06/14/2014 - 05:34 PM Research Types ADD Health Genetic Influence IQ Kevin M. Beaver Kinship Pairs Non-Shared Environment Shared Environment